Draws a page in an area on a device context. This is a parameter of the VAPIM_DRAW message.
#include <kvvapi.h> SendMessage(hWndVAPI,VAPIM_DRAW, VAPIMWP_DRAW_DRAWPAGE, (LPARAM) (TPVAPIDrawPageInfo*) pDrawInfo );
| Argument | Description |
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hWndVAPI
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The handle of the VAPI window. |
pDrawInfo
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A pointer to a TPVAPIDrawPageInfo structure that contains information used for drawing. To draw pages in any order, set the |
SendMessage() returns:
VAPI_RETURN_SUCCESS if the call succeeds.
VAPI_RETURN_NOT_INITIALIZED if the drawing routines have not been initialized.
VAPI_RETURN_NO_PAGE if the requested page does not exist, or is being displayed before all previous pages have been displayed.
VAPI_RETURN_NOT_AVAILABLE if the document does not support this feature (for example, ZIP files, video, audio).
VAPI_RETURN_ERROR if an error has occurred.
Before you send this message, initialize VAPI by sending the VAPIMWP_DRAW_INIT message, and then open the document by sending the VAPIMWP_INIT_OPEN_DOCUMENT message.
Page numbers start at 0. For example, set uPage to 0 to draw page 1, and to 1 to draw page 2.
By default, you must draw pages sequentially: to draw page 3, you must first draw pages 1 and 2. To draw pages in any order, set the bWait parameter in the TPVAPIOpenDocumentInfo structure to FALSE.
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